score:172

Accepted answer

How about using dropRight, which works in 2.8:-

"abc!".dropRight(1)

Which produces "abc"

score:2

If you want just to remove the last character use .dropRight(1). Alternatively, if you want to remove a specific ending character you may want to use a match pattern as

val s: String = "hello!"
val sClean: String = s.takeRight(1) match {
    case "!" => s.dropRight(1)
    case _   => s
}

score:4

string.reverse.substring(1).reverse

That's basically chop, right? If you're longing for a chop method, why not write your own StringUtils library and include it in your projects until you find a suitable, more generic replacement?

Hey, look, it's in commons.

Apache Commons StringUtils.

score:5

If you want the most efficient solution than just use:

str.substring(0, str.length - 1)

score:7

val str = "Hello world!"
str take (str.length - 1) mkString

score:13

string.init // padding for the minimum 15 characters

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